Exception and ESP32 restart due to missing check for connection in method "eQ3::onTick()"

[KlausMu]

In file "lib/eQ3/eQ3.cpp" in method "bool eQ3::onTick()" I had to replace the block

        } else {
            sendNextFragment();
            lastActivity = time(NULL);
        }

with

        } else if (state.connectionState != DISCONNECTED) {
            sendNextFragment();
            lastActivity = time(NULL);
        }

otherwise I got exceptions and restarts of the ESP32.

Looking at the code it seems that the original author was aware that this code needed some more fine tuning.

[KlausMu]

In the meantime, this change is included in this pull request